What is the average price for a flight to Idaho with United Airlines?

The typical United Airlines fare to Idaho averages $277 for a return flight and around $323 for a one-way ticket.

Does United Airlines usually have the lowest fares for flights to Idaho?

Allegiant Air frequently offers the lowest average return price for flights to Idaho, but fares can vary between airlines and dates. We recommend comparing all available options on KAYAK before booking your flight.

What other airlines fly to Idaho besides United Airlines?

In addition to United Airlines, airlines such as Allegiant Air, Delta and Alaska Airlines also operate flights to Idaho. Check KAYAK to compare fares from these and other carriers.

United Airlines flights to Idaho (USID) from $94

Flight Deals

Cheap United Airlines Flight Deals to Idaho

Here are some of the best deals found on KAYAK recently from United Airlines to Idaho that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Last minute

Direct

Recent round-trip United Airlines flight deals from the United States to Idaho

Sat, Jan 17 - Sun, Jan 18

12:35 pm - 9:23 pmSEA-BOI

7h 48m1 stop

10:48 am - 3:44 pmBOI-SEA

5h 56m1 stop

$179United Airlines

Find Deal

Fri, Jan 16 - Mon, Jan 19

5:20 pm - 11:48 pmLAX-BOI

5h 28m1 stop

10:15 am - 11:51 amBOI-LAX

2h 36mnonstop

$207United Airlines

Find Deal

Thu, Dec 11 - Sun, Dec 14

10:20 am - 1:35 pmLAX-BOI

2h 15mnonstop

1:50 pm - 3:14 pmBOI-LAX

2h 24mnonstop

$209United Airlines

Find Deal

Wed, Dec 17 - Sat, Jan 10

1:33 pm - 6:44 pmLAX-GEG

5h 11m1 stop

6:53 am - 12:24 pmGEG-LAX

5h 31m1 stop

$217United Airlines

Find Deal

Thu, Dec 11 - Sun, Dec 14

4:15 pm - 11:44 pmLAX-BOI

6h 29m1 stop

1:50 pm - 3:14 pmBOI-LAX

2h 24mnonstop

$219United Airlines

Find Deal

Mon, Dec 8 - Fri, Dec 12

10:20 am - 1:35 pmLAX-BOI

2h 15mnonstop

1:50 pm - 3:14 pmBOI-LAX

2h 24mnonstop

$237United Airlines

Find Deal

Wed, Dec 10 - Sat, Dec 13

5:11 pm - 11:44 pmSEA-BOI

5h 33m1 stop

2:49 pm - 9:21 pmBOI-SEA

7h 32m1 stop

$239United Airlines

Find Deal

Wed, Dec 10 - Wed, Dec 17

5:11 pm - 11:44 pmSEA-BOI

5h 33m1 stop

1:50 pm - 9:00 pmBOI-SEA

8h 10m2 stops

$244United Airlines

Find Deal

Mon, Dec 15 - Tue, Dec 16

3:25 pm - 11:44 pmSEA-BOI

7h 19m1 stop

2:20 pm - 6:32 pmBOI-SEA

5h 12m1 stop

$247United Airlines

Find Deal

Mon, Dec 8 - Fri, Dec 12

6:52 pm - 11:44 pmLAX-BOI

3h 52m1 stop

1:50 pm - 3:14 pmBOI-LAX

2h 24mnonstop

$247United Airlines

Find Deal

Useful Info

Low season	April
High season	March
Cheapest flight	$94
Average price round-trip	$277
Good deal round-trip	$235
Good deal one-way	$296

Best time to beat the crowds with an average 9% drop in price.

Most popular time to fly and prices are also 3% lower on average.

Flight from Seattle to Boise

(avg. price over the last 2 weeks)

or less

KAYAK's insights & trends for flights to Idaho

Get data-powered insights and trends for flights to Idaho to help you find the cheapest flights, the best time to fly and much more.

Prices

The cheapest ticket to Idaho from the United States found in the last 72 hours was to Boise, at $151 round-trip. The most popular route is San Francisco (SFO) to Boise (BOI) and the cheapest round-trip airline ticket found on this route in the last 72 hours was $151.

What is the cheapest day to fly to Idaho?

Based on KAYAK data, the cheapest day to fly to Idaho is Friday where round-trip tickets can be as cheap as $381. On the other hand, the most expensive day to fly is Sunday, where round-trip prices are $505 on average.

What is the cheapest month to fly from the United States to Idaho?

The cheapest month for flights from the United States to Idaho is February, when tickets cost $364 (return) on average. On the other hand, the most expensive months are March and December, when the average cost of round-trip tickets is $742 and $718 respectively.

Which is the cheapest airport to fly into in Idaho?

Prices will differ depending on the departure airport, but generally, the cheapest airport to fly to in Idaho is Idaho Falls Fanning Field Airport (IDA), with an average flight price of $258.

Find deals

What is the average price for a flight to Idaho with United Airlines?
The typical United Airlines fare to Idaho averages $277 for a return flight and around $323 for a one-way ticket.
Does United Airlines usually have the lowest fares for flights to Idaho?
Allegiant Air frequently offers the lowest average return price for flights to Idaho, but fares can vary between airlines and dates. We recommend comparing all available options on KAYAK before booking your flight.
What other airlines fly to Idaho besides United Airlines?
In addition to United Airlines, airlines such as Allegiant Air, Delta and Alaska Airlines also operate flights to Idaho. Check KAYAK to compare fares from these and other carriers.

7.4

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7.3Comfort

6.6Food

7.1Entertainment

7.7Boarding

8.1Crew

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Flight was quick and easy. (in 2447 reviews)

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Have the middle seats vacant. (in 137 reviews)
The space in economy plus. (in 296 reviews)

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10.0 Wonderful

Mike, Nov 2025

I dread trans-Pacific flights. They are very long. This was my first time on Universal, and it was my best crossing ever. The staff were professional, the hospitality was great, and the food was delicious. The entertainment system filled the long flight hours. I will seek out Universal flights from now onwards. 🙂

8.0 Very good

Anonymous, Nov 2025

on time and entertainment on board

10.0 Wonderful

Paul, Nov 2025

United has come a long way, it’s been a fantastic experience traveling with them.

10.0 Wonderful

Anonymous, Nov 2025

The whole experience was excellent

10.0 Wonderful

Anonymous, Nov 2025

The whole experience was excellent

8.0 Very good

David, Nov 2025

Even though we were delayed, we were able to make our connection

10.0 Wonderful

Claire, Nov 2025

Seats in waiting area and on plane hard as rock. Fast internet on the flight was great! Crew was kind.

10.0 Wonderful

David, Nov 2025

Starlink wifi on the Embraer E175 is an excellent experience. I was able to connect and work from IAD all the way to approach into BTV.

10.0 Wonderful

Gheorghe, Nov 2025

Is my favorite Lufthansa?

8.0 Very good

Semra, Nov 2025

Good trip. Good crew. Thank you!

Everything you need to know for your flight to Idaho

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Find cheap United Airlines flights to Idaho from $94

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Cheap United Airlines Flight Deals to Idaho

Recent round-trip United Airlines flight deals from the United States to Idaho

Recent one-way United Airlines flight deals from the United States to Idaho

Recent last minute United Airlines flight deals from the United States to Idaho

Recent direct United Airlines flight deals from the United States to Idaho

Good to know

KAYAK's insights & trends for flights to Idaho

Get data-powered insights and trends for flights to Idaho to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest flight to Idaho?

The cheapest ticket to Idaho from the United States found in the last 72 hours was to Boise, at $151 round-trip. The most popular route is San Francisco (SFO) to Boise (BOI) and the cheapest round-trip airline ticket found on this route in the last 72 hours was $151.

What is the cheapest day to fly to Idaho?

Based on KAYAK data, the cheapest day to fly to Idaho is Friday where round-trip tickets can be as cheap as $381. On the other hand, the most expensive day to fly is Sunday, where round-trip prices are $505 on average.

What is the cheapest month to fly from the United States to Idaho?

The cheapest month for flights from the United States to Idaho is February, when tickets cost $364 (return) on average. On the other hand, the most expensive months are March and December, when the average cost of round-trip tickets is $742 and $718 respectively.

Which is the cheapest airport to fly into in Idaho?

Prices will differ depending on the departure airport, but generally, the cheapest airport to fly to in Idaho is Idaho Falls Fanning Field Airport (IDA), with an average flight price of $258.

How many airports are there in Idaho?

There are 3 airports in Idaho. The busiest airport is Boise Airport (BOI), with 63% of all flights arriving there.

How long is the flight to Idaho?

An average nonstop flight from the United States to Idaho takes 3h 48m, covering a distance of 1198 miles. The shortest route is Seattle (SEA) to Spokane (GEG) with an average flight time of 1h 10m.

How many direct flights to Idaho are there each day?

There are around 21 direct flights from within United States to Idaho every day. Most flights (43%) depart in the morning.

How many direct flights to Idaho are there each week?

Each week there are around 145 direct flights from within United States to Idaho. The most common day for departures is Monday, with 16% of flights taking off on this day.

How many long-haul flights are there to Idaho each week?

Each week, there are 7 medium-haul flights (3-6 hour flight duration) and 138 short-haul flights (up to 3 hour flight duration) to Idaho. There aren't any long-haul flights (6-12 hour flight duration).

How many cities have direct flights to Idaho?

From the United States, there are direct flights to Idaho from 4 cities. The city with the most direct flights is Denver, with 94 direct flights each week.

What are the most popular destinations in Idaho?

Based on KAYAK flight searches, the most popular destination is Boise (34% of total searches to Idaho). The next most popular destinations are Jackson (32%) and Spokane (27%). Searches for flights to Hailey (6%) and to Idaho Falls (1%) are also popular.

FAQs for flying to Idaho with United Airlines

What is the average price for a flight to Idaho with United Airlines?

Does United Airlines usually have the lowest fares for flights to Idaho?

What other airlines fly to Idaho besides United Airlines?

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Everything you need to know for your flight to Idaho

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